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Native image + a few smaller optimisations (#564)

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* Inline parsing name and station to avoid constantly updating the offset field (-100ms)

* Remove Worker class, inline the logic into lambda

* Accumulate results in an int matrix instead of using result row (-50ms)

* Use native image
This commit is contained in:
Roman Musin
2024-01-23 19:19:07 +00:00
committed by GitHub
parent ba793e88cd
commit 6c0949969a
3 changed files with 135 additions and 134 deletions
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13
calculate_average_roman-r-m.sh
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@@ -21,4 +21,15 @@ JAVA_OPTS="--enable-preview -XX:+UseTransparentHugePages"
# see https://stackoverflow.com/questions/58087596/why-are-repeated-memory-allocations-observed-to-be-slower-using-epsilon-vs-g1
JAVA_OPTS="$JAVA_OPTS -XX:+UnlockExperimentalVMOptions -XX:-EnableJVMCI -XX:+UseEpsilonGC -Xmx1G -Xms1G -XX:+AlwaysPreTouch"
java $JAVA_OPTS --class-path target/average-1.0.0-SNAPSHOT.jar dev.morling.onebrc.CalculateAverage_roman_r_m
if [ -f target/CalculateAverage_roman_r_m_image ]; then
echo "Picking up existing native image 'target/CalculateAverage_roman_r_m_image', delete the file to select JVM mode." 1>&2
target/CalculateAverage_roman_r_m_image
else
JAVA_OPTS="--enable-preview -XX:+UnlockExperimentalVMOptions -XX:+TrustFinalNonStaticFields -dsa -XX:+UseNUMA"
if [[ ! "$(uname -s)" = "Darwin" ]]; then
# On OS/X, my machine, this errors:
JAVA_OPTS="$JAVA_OPTS -XX:+UseTransparentHugePages"
fi
echo "Choosing to run the app in JVM mode as no native image was found, use additional_build_step_roman_r_m.sh to generate." 1>&2
java $JAVA_OPTS --class-path target/average-1.0.0-SNAPSHOT.jar dev.morling.onebrc.CalculateAverage_roman_r_m
fi